TWS M1 Bluetooth 5.0 Wireless Earbuds Earphone

Package:
1 x TWS M1 Bluetooth Headphones (Left and Right Ears)
1 350mAh charging box
1 x USB charging cable
1 x user manual

Specification:
Bluetooth Version: V5.0
Distance to Bluetooth: 15 meters / 49 feet (no obstacles)
Charging time: about 1-2 hours
Standby time: about 60 hours
Music time: about 3 hours
Talk Time: about 4 hours
Audio transmission format: HFP / A2DP / HSP / AVRCP
Batteries ask ear: 45mAh polymer lithium battery
Battery box battery: Lithium polymer 350mAh battery
Working Voltage: 3.3 - 4.2 Volts
Charging Voltage: DC 5V
Frequency: 2.4-2.48 GHz
Horn impedance: 32Ω
Face Bandwidth: 20-20KHz
Face sensitivity: 98 + 3dB
Sensitivity for microphone: -42 +/- 2db